NYC-WTC_000230333

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (litersl: 1920 Lab Group 6673 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 17 Grid Opening Size: 0.01124

Client Sample #: 17 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20 000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: .2/14/02.

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ■ ID of Structure Norv EDS • (Nonadb No F B C >=05 u Chrys Amphibole ■Nonasb Ambig/ND No Coord <5p. Elements)

\___ e- ^3 A

Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptance: ■/= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded orovedapped grid squares <5% F B C M >5p ^l= EDS spectrum conforming to laboratory holes or opaque areas. identification criteria observed Chrysotile . AMPHIBOLES Amphibole F = Single Fiber Amosite '. 8 = Bundle (<3 fibers <1 fiber diameter apart ! Crocidolite ’ Ambiguous ■C = Cluster (>3 Intersections) I Anthophyllite Non-Asbestos Tremolite M = Matrix 1 Non-Identified Actinolite NSD = No Structures Detected I

CONFIDENTIAL, CITY_21MC100_003389078 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000230333